Spacing mechanism for pulverizing-grates.



` H. J. SHELTON.4

' SPAGING MEUHANISM POR PULVERIZING GRATBS.

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1,085,638. Peennea Feb. 3, 1914.

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H. J. SHELTON.

SPAGING MEGHANISM FOB. PULVERIZING GRATES.

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SPACING MECHANISM, FOR PULVER-IZINGGRATES.

Specification of Letters Patent.

Patented Feb. 3, 1914.

Application filed January 4, 1913. Serial No. 740,179.

To all Qtr/om it ma 1/ Concern.

Be. it known that I, HENRY J. Summon, a citizen of the United States, and resident of St. Louis, 'lissouri, have invented certain new and useful improvements in Spacing :echaniszn for Pulverizi11g-Gratos, of which the following is a specification containing a full, clear. and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relat-es to an improved spacing mechanism for pulverizer grates; machines of the class in which material of any ri numerous sorts is reduced more or less iinely by means of rapidly rotating hammer bars which are caused to repeatedly impinge upon the material as it passes through the machine.

rlhe object of my invention is to provide an improved spacing mechanism for pulverizer grates, whereby the said bars may be spaced nearer to or farther from each other, thereby reducing the material to ditl'erent grades of ineness.

A further object is to provide a pulverizer with interchangeable rate bar spacing ,end seats for the purpose Just mentioned.

In the drawings: Figure l is a sectional side elevation of a portion of a pulverizer cage or grate, the section being taken on the line 1-1 of Fig. 2; Fig. 2 is a sectional plan view of the same; Fig. 3 is a perspective view of one of my improved interchangeable grate bar seats; Fig. 4 is a transverse section taken through one of the grate bars and its seat on the line 4 4 of Fig. 2: Fig. 5 is a view similar to Fig. l (the section being taken on the line 5 5 of Fig. 6) showing the grate bars spaced farther apart; and Fig. (i is a top plan View of a portion of the pulverizer cage shown in Fig. 5.

The numeral l indicates the opposite vertical side walls of ,the.cage, having upon their inner surfacecircular grooves 2. in which are removably and interchangeably located a series of fl'rate bar spacing seats 3.

'lhe numeral 4- indicates the grate bars, which are ot' the usual construction, preferably made of tool steel wedge shaped in cross sect-ion, to permit the material to readily clear as it is being discharged through the spaces between said bars. Said grate bar seats 3 are preferably in the form of segmental steel castings, having formed in their upper and inner sides tapered recesses in which the tapered opposite sides of said grate bars are detachably mounted. the outer sides of said grate bar seats being closed while the upper and inner sides are open, and a series of said seats 3 are located in the opposite segmental grooves 2 of the opposite cage walls, with corresponding grate bars 4 located in said seats, thereby properlyY spac ing the grate bars and holding them securely in such spaced position during op eration. The top of the seats 3 being open. the grate bars may be readily dropped into and removed from said seats without disturbing the position of the said seats.

In Figs. l and 2 I have shown the bars spaced comparatively near each other,whilc in Figs. 5 and 6 I have shown the grate bars spaced fart-her apart. The graduation in spacing is accomplished by using bar seats 3 having abutting side walls 5 of various thicknesses, corresponding to the space dcsired between the. grate bars. The side-walls i, of the seats dare connected and closed by an outer integral wall, for the purpose ot strengthening the device and also to keep thc scat from sliding inwardly upon its grate-bar 4.

1t will be observed that the abutting side walls 5 in the construction shown in Figs. 5 and 6 is considerably thicker than that shown in Figs. l and 2, thereby spacing the grate bars 4 farther apart- The operation of my invention is obvious,y

and need not be further described.

l claim:

The improved seat t'or pulvcrizer grate` bars. comprising the conibination with a series of gratebarsot a sepa-rate L-shaped scat-block for each end of cach bar. said block haring an upwardly-uien V-shaped bar-bearing which extends troni the top to the bottom of said block and leaves an opening at both top aud bot-tom thereof` so that `the bar may be dropped into and removed name to this specification, in presence of two from its bearings from a, point above, the subscribing Witnesses. end-walls of said block at the outer end of said V-shaped bearing being connected by HENRY J' SHELTON 5 an integral part which closes said outer end Witnesses:

of said bearing. E. L; WALLACE,

In testimony whereof, I have signed my -E. M. HARRINGTON. 

